HOWTO make a chocolate model of your brain

Instructables contributor Inition used a 3D printer to bring his pal Andy's MRI brain scan data into a much more tangible form: a chocolate taste treat. Above is Andy eating his own brain. "Edible Chocolate Brain from MRI Scan"

So awesome.
So hypothetically, if I wanted an MRI or CT scan of my head for the purpose of making a 3d print of my skull just for fun + art, but I don’t have any medical need for such a scan, would that be at all possible? Anyone know if hospitals would ever allow their equipment to be used for artistic purposes?